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Finding the Fourth Proportional to 647,779.91, 969,676.96 and 422,655.60

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Solution

The fourth proportional to 647,779.91, 969,676.96 and 422,655.60 is: 632,683.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,779.91 : 969,676.96 = 422,655.60 : x
  2. Step 2: Convert to fraction form
    647,779.91/969,676.96 = 422,655.60/x
  3. Step 3: Cross multiply
    647,779.91x = 969,676.96 × 422,655.60
  4. Step 4: Simplify right side
    647,779.91x = 409,839,396,441.39
  5. Step 5: Solve for x
    x = 409,839,396,441.39/647,779.91
  6. Step 6: Final answer
    x = 632,683.09

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.